. The Biological bulletin. Biology; Zoology; Marine biology. 196 WILLIAM MORTON WHEELER. louteux, alluvial, j'ai toujours trouve la race agyptiacus Emery, et dans le desert rocailleux la race striaticeps ; Now the race or subspecies czgyptiacus has well-developed ammochsetae, and in striaticeps these bristles are also present, though more feebly developed. M. arenarius Fabr., and caviceps Forel, two species peculiar to the dry sandy portions of the Sahara, and apparently also M. bugnioni Forel of the same region, have highly developed ammochsetae, but these are absent in the Europea
. The Biological bulletin. Biology; Zoology; Marine biology. 196 WILLIAM MORTON WHEELER. louteux, alluvial, j'ai toujours trouve la race agyptiacus Emery, et dans le desert rocailleux la race striaticeps ; Now the race or subspecies czgyptiacus has well-developed ammochsetae, and in striaticeps these bristles are also present, though more feebly developed. M. arenarius Fabr., and caviceps Forel, two species peculiar to the dry sandy portions of the Sahara, and apparently also M. bugnioni Forel of the same region, have highly developed ammochsetae, but these are absent in the European M. structor, and in lobicornis, a form discovered by Forel in the oasis at Among our American species, M. pergandei Mayr and julianus Pergande have well-developed ammochsetae, whereas andrei. Fig. 6. Messor pergandei Mayr. Mayr, carbonarius Pergande and stoddardi Emery have only the usual hairs on the lower surface of the head. The habits of car- bonarius, jidianus and stoddardi are unknown but pergandei, as I can assert from my own observations, lives only in the driest por- tions of the deserts of Arizona and California, and andrei and stoddardi are cited only from more humid portions of the latter state. The head of pergandei, which is represented in Fig. 6, shows a fine development of the clypeal, mandibular and gular bristles. The gular series form an arc on each side bounding a distinctly concave median region separated from the convex lower portions of the cheek by a distinct ridge (represented in the figure by a dotted line along the insertions of the bristles). 1 " Les Formicides de la Province d'Oran (Algerie)," Bull. Soc. Vaud. Sci. Nat. XXX., no. 114, 1894, pp. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-
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